Merge "better manage buffer for libstagefright_soft_mpeg4enc" into klp-dev am: 021575025c am: 5944b611e5 am: 1a419c7b2a am: 70a63bdf27 am: 40833da7b9 am: 2ad98cf1c7
am: be560fcb1c

Change-Id: Ia48ab3048f31dbf53c2c5dd78044fc9dd1b855bf